Washing machines



Oct. 9, 1956 A LODGE 2,765,644

WASHING MACHINES Filed July 17, 1951 4.Sheets-Sheet 1 ALVIN LODGE :m r rattorney Oct. 9, 1956 A. LODGE WASHING MACHINES 4 Sheeis-$heet 3 FiledJuly 17, 1951 6 ALVIN LODGE FIG.

Cittorneg 9st. 9, 1956 A. LODGE 2,765,644

WASHING MACHINES Filed July 17, 1951 4 Sheets-Sheet 4 86 L O D GEZhibentor Qttomeg WAS G MACHINES Alvin Lodge, Erie, Pa, assignor toBlackstone Corporation, Jamestown, N. Y., a corporation of New YorkApplication July 17, 1951, Serial No. 237,251

Claims. (Cl. 68-23) This invention relates to washing machines of thetype in which a single receptacle is utilized to wash, rinse, andcentrifugally dry clothes. More particularly, the invention is directedto improvements in an automatic machine of this type that may be causedto function in a sequence and other designated by an operator.

The invention is more specifically directed to a washing machine of thetype shown and described in my'pending application, Serial No. 221,685,now Patent No. 2,700,884, wherein a top-opening receptacle, containingan agitator, is axially adjusted in the course of changing from and to awashing and rinsing position and a spinning position. In thisapplication, a lift cam is shown as the means for raising and loweringthe receptacle. In the present application, the mechanism by which thelift cam is power operated is disclosed, as well as manually controlledmechanism for changing the position of this cam to change the axialposition of the receptacle. Of course, simultaneously with any change inposition of the lift cam, certain other operations take place whichconstitute a part of a complete washing and drying cycle. It is evidentthat in machines of this type, a loaded receptacle representsconsiderable weight which must be properly supported and also be capableof being raised to facilitate drainage at various times during acomplete laundering cycle. The support and axial movement of a loadedreceptacle constitutes no problem when the machine is functioning in itspredetermined operational sequence. The Weighted receptacle itself,however, represents a control problem when it is desired to manuallyalter the sequence of operation, such as by repeating a previousoperation or advancing the sequencev of operation. Such manual changesare necessary in the adaption of a washing machine to all kinds oflaundering operations. In some instances, repeated rinse operations aredesirable, whereas, in other instances, a washing operation may beeliminated and only a rinsing and spin drying operation performed. Undersuch circumstances, the machine must be manually controlled, and it iswith this particular phase of operation of an automatic washing machinethat the present invention is concerned.

it is an object of the present invention to provide a mechanism forsupporting and axially moving a washing machine receptacle from oneoperative position to another with the least possible time loss.

It is another object of the invention to provide a supporting and axiallift mechanism for a washing machine receptacle that is selectivelyresponsive to an automatically operable timing mechanism or a manuallyactuable control member.

A further object of the invention lies in the provision of a liftmechanism for the receptacle of a washing machine that is positive inoperation, being directly actuated by a further motor driven mechanism.

Another important object of the invention lies in the provision of asequence mechanism for an automatic washing machine that is manuallycontrollable to change.

from any given operation to a previous or advanced operation withoutinjury to the operative parts of the machine and without operator effortother than the simple manipulation of a control knob.

Other and important objects of the invention will be more fullyunderstood from a consideration of the following specification, taken inconjunction with the accompanying drawings, and in which Fig. 1 is afragmentary side elevational view of a washing machine embodying oneform of the invention, parts being broken away to disclose the positionand relationship of certain of the operative mechanisms;

Fig. 2 is an enlarged fragmentary vertical sectional view of themechanism contained within the gear housing shown in Fig. 1;

Fig. 3 is a fragmentary horizontal sectional View of the gear housingshowing a part of the operating mechanism and being taken substantiallyon the line 3-3 of Fig. 2;

Fig. 4 is a fragmentary plan view of an indexing cam and rocker actuatorin the relative position occupied during a spinning operation;

Fig. 5 is a view similar to Fig. 4 showing the position of the indexingcam and a rocker actuator during a washing operation;

Fig. 6 is a fragmentary plan view of an oscillating member for therocker actuator and shows a sequence cam therebeneath in spinningoperation position;

Fig. 7 is a fragmentary vertical sectional vie-w showing the receptaclein position of rest and the agitator clutch disengaged when the sequencecam is in receptacle filling position;

Fig. 8 is a view similar to Fig. 7 showing the receptacle in restposition and the agitator clutch engaged when the sequence cam is inwashing position (see Fig. 5);

Fig. 9 is a view similar to Fig. 7 and shows the receptacle partiallyraised to drain the contents thereof and the agitator clutch disengagedwhen the sequence cam is in drain position;

Fig. 10 is a view similar to Fig. 7 showing the receptacle fully raisedand the agitator clutch disengaged when the sequence cam is inreceptacle spinning position (see Fig. 6);

Fig. 11 is a perspective view of the and Fig. 12 is a fragmentarydevelopment view of the cam shown in Fig. 11.

Referring to the drawing, and particularly to Fig. 1, the referencenumeral 10 is employed to generally designate a single receptaclewashing, rinsing, and centrifugal drying machine in which is embodiedone form of the invention. The machine is enclosed within a rectangularcabinet, only the front wall 11 of which is indicated, inasmuch as thiscabinet constitutes no part of the invention. Within the upper part ofthe cabinet is located a receptacle 12, whereas the lower part of thecabinet contains the receptacle supporting and operating structure. Thesupporting structure constitutes no. specific part of the presentinvention and is merely disclosed and described to provide proper.association of parts as between the receptacle 12 and the drivemechanism contained within the gear housing 13. A fixture 14 has a lowercentral portion that is formed to provide a hub 16 in which is supporteda sleeve 17. The fixture 14 includes multiple radially extendingportions 18 which, at their ends, project upwardly to form arms 19.These arms are curved inwardly to form an upper integral. hub 21 whichserves as an additional mount for the sleeve 17. Adjacent the lower endof each arm 19 is permanently secured a radially extending bracket 22which rests on a resilient block 23 that is in turn carried by aninclinedmember 24. A bolt 26 serves to join bracket 22, block 23receptacle lift cam;

and member 24. The gear housing 13 is secured to the lower end of thehub 16 that forms a part of the fixture 14.

. The sleeve 17, at its upper end, mounts a plate 27 through a suitablecollar 28. The plate 27 is circularly ribbed, substantially as shown, togive desired rigidity inasmuch as it constitutes, under certainconditions of operation, a support for the receptacle 12 and itscontents. The' outer edge of this plate terminates in an upwardlyinclined flange which mounts a liquid seal ket 29 that prevents drainagefrom the receptacle under certain conditions of operation of the device.Above the collar 28 is shown a sleeve 31 which mounts the recep tacle12. The particular association of the sleeve 31 with the receptacleforms no part of the invention and it is therefore sufiicient to pointout that this sleeve is rotatable about its axis for the purpose ofspinning the receptacle during a drying operation and is also axiallymovable in a manner hereinafter fully set forth for the purpose ofraising or lowering the receptacle away from or on to the plate 27.Extending through sleeve 31 is a shaft 32 which, at its upper end,mounts a gear 33. The re ceptacle includes a circular side wall 34 andbase 36. The base is formed with a central circular opening, the rim ofwhich rests on and has water-tight securement with an annular flange 37of a center post or hub 38. It is with this post that the sleeve 31 isengaged in a manner to support the entire receptacle. Adjacent theflange 37 of the hub base are a series of drain openings 39 which are solocated as to be engaged with the gasket 29 of the plate 27 when thereceptacle is in its lowermost position. The gasket and openings 29 and39 cooperate to provide valves for controlling withdrawal of liquid fromthe receptacle. An agitator 41 consists of a hollow post from whichblades 42 extend on a generally radial direction. The lower end of thepost terminates in a flared rim 43. The upper end of this-postterminates in an inwardly directed flange 44 to which is secured a ringgear 46. It will be noted that shaft 33 extends upwardly through ringgear 46 and that gear 33 on said shaft is movable into and out ofengagement with said ring gear. This structure constitutes a clutch bywhich to drive or oscillate the agitator. The upper end of the agitatorpost may be suitably closed by a cap 47. I

Between the collars 16 and 21 is located a drive pulley 48 by which thereceptacle is caused to spin. This pulley, in a manner disclosed in theabove identified pending application, has operative connection with thesleeve 31. The agitator oscillating shaft 32 extends downwardly into thegear housing 13 and is fitted with a pinion gear 49.

Referring more particularly to Figs. 2 and 3 of the drawing, attentionis directed to the gear housing 13 and the mechanism contained therein.As has already been mentioned, the gear housing is attached to andcarried by the fixture 14 beneath the hub 16. The upper portion 51 ofthis housing is formed with a lower horizontal rim 52 to which acorresponding flange 53 of a removable bottom or pan 54 is attached.Suitable bosses depend from the upper portion 51 of the housing, such asindicated at 56 and 57. The boss 56 is apertured to receive a sleeve 58through which a shaft 59 projects. The other boss 57 is apertured tosupport a pin 61. Pin 61 extends beneath the reinforcement 57 and mountsa gear 62. Although not shown, this gear is driven by a further smallergear that is connected with the motor of the device. Beneath the gear 62is a connecting rod63. One end of this rod is pinned, as at 64, to gear62. Mounted to oscillate about shaft 59 is a gear segment 66. The teeth67 of this segment are engaged with the teeth of gear 49 mounted on thelower end of agitator shaft 32. As may be seen in Pig. 6, the other endof the rod 63 is joined by a pin 68 to the outermost portion of the gearsegment 66. Thus, rotation of gear 62 causes gear segment 66 tooscillate, and in turn oscillate shaft 32 and the agitator 41.

Generally opposite the teeth, gear segment 66 continues in an arm 69,having an end 71 provided with two openings 72 and 73. As may be seen inFigs. 2 and 6, the sleeve 58 mounts gear segment 66. Between the hub ofthe segment and the end 71, the arm 69 may be formed with lateralextensions 74 which have a common surface in the plane of the end 71.These surfaces provide support for a ring 76 that loosely encircles thesleeve 58. A lateral extension or lug 77 of this ring mounts a curvedarm 78, the ends of which terminate in hooks 79 and 81.

its pin 116, causing This arm is made fast to the end of the lug 77 andthese two parts are mounted by means of a pin 82 for oscillation withthe arm 69 of the segment 66. Pin 82 projects into the opening 72 of thesegment end 71. It is evident that as segment 66 and arm 69 are causedto oscillate, hook arm 78 will also oscillate. Mounted above the hookarm 78 is a plate 83 that is rotatable about the lower end of the boss56. This plate and the upturned rim 84 thereof constitute a lifting cam86 by means of which the receptacle 12 is axially moved. The rim 84 inpart constitutes a cam surface and is shown to be of varying heights andinclines which bear against the cone-like base 87 of a cylindricalmember 88. The cylindrical member 88, through structure shown anddescribed in my above identified pending application, is connected withsleeve 31 that, as already mentioned, mounts the receptacle 12. Securedto the under face of the cam 86 is an indexing plate 89. This plate isin the plane of the hook arm 78 and includes a radially extending lug91, having opposed shoulders 92 and 93. Beyond the shoulder 92 is afurther shoulder 94, set inwardly of the previously mentioned shoulderand, again, farther along the periphery of this plate is a still furtherinwardly offset shoulder 96. In the opposite direction from the lug 91and beyond the shoulder 93 are successively inwardly offset shoulders 97and 98. Beneath the segment 66 are the timing plates 99 which determine,in the normal automatic sequential operation of the device, the lengthof time of each given operation. This particular structure forms no partof the present invention. Beneath the timing plates 99, and secured tothe lower end of the shaft 59, is a sequence cam 101.

The upper end of shaft 59 mounts a switch and water cam assembly,generally indicated at 102. This assembly includes a pair of upstandingarms 103 which, with the corresponding end bracket 104, cooperate toprovide a universal connection as between shaft 59 and a rod 106. Theother end of rod 106 is fitted with a universal connection 107 forcoupling with a further rod 188. This last mentioned rod extendsupwardly of the inner face of the wall 11 of the cabinet, beingsupported in any suitable manner, as by brackets 109. The upper end ofrod 108 mounts a beveled gear 111, engaged with a further beveled gear112, carried by shaft 113 which, on the outer face of the cabinet,mounts a central knob 114. From this, it is evident that rotation of theknob 114 will rotate the sequence cam 101.

It will be understood that, although the lifting cam 86 is actuated toraise or lower the receptacle 12 by power driven means, it may be setfor such actuation through manipulation of the knob 114. This knob, ashas been described, is capable of rotating the sequence cam 101. A pin116 depends from a suitable boss forming a part of the gear housing 51.This pin mounts one end of a channel member 117. The other end of thischannel member carries a pin 118 which, above one side of said member,serves to mount a roller 119. The pin extends downwardly from thechannel member and is intended to contact the cam-like perimeter of thesequence cam 101. A spring 121 is engaged with the pin 118 and thusurges the member 117 in a clockwise direction about the roller 119 to atall times contact the edge of ring 76. A further spring 122 is engagedat one end with a pin 123, carried by the ring 76 at a point nearlyopposite the roller 119. The other end of this spring is engaged withthe pin 118.

The sequence cam 101 is provided with a series of cam surfaces extendingaround the edge thereof. The outermost surface is formed by an arcuatesegment 124 that is of a considerable length. A further segment 126, oflesser length but on the same radius, is also formed on the cam.Radially inwardly, an arcuate segment 128 adjoins the segment 124. Andsubstantially diametrically opposite this last mentioned segment is afurther segment 129 formed on the same radius as the segment 128.Further inwardly from the edge of the cam are arcuate segments 131 and132, arranged on the same radius. Segment 131 is adjacent segment 126,whereas segment 132 is adjacent segment 124. Still further inwardly ofthe cam are spaced arcuate segments 133 and 134. These segments are onthe same radius. It will be noted that starting with segments 124 and126, pairs of segments are stepped radially inwardly of the cam. Thesesegments serve, during operation of the machine, to guide pin 118 into aposition such that a selected one of the arms 78 will, through its hookend, have engagement with the indexing cam and operate to rotate saidcam in the desired direction and to a desired extent. Of course, sincethe indexing cam is attached to the lift cam 86, this latter cam will berotated and serve to raise or lower the receptacle to a predeterminedextent. The lift cam 86 is formed with a series of steps in the rim 84thereof which correspond to the various steps of the sequence cam 101.The lowermost step 136 of the lift cam corresponds to segments 124 and126 of the sequence cam. Step 137 of the lift cam corresponds tosegments 128 and 129 of the sequence cam. Step 138 corresponds tosegments 131 and 132 of the sequence cam and, finally, step 139 corresponds to the innermost segments 133 and 134.

Preliminary to a description of the operation of the present invention,it is again mentioned that the invention is not directed to a timingmechanism which functions automatically to produce a timed sequence ofoperations but, rather, to a mechanism by which the normal timedsequence of operations may be changed at will by an operator of themachine without in any way damaging, jamming, or otherwise injuring theoperative parts thereof. For purposes of illustration, it may be assumedthat the automatic structure of the machine is not functioning in orderthat manual control of the various operations may be more clearlypointed out. Inasmuch as several of the views of the drawing show theoperative parts in a position to spin the receptacle 12, it may beassumed that it is from this position or step of operation that theoperator wishes to change. Figs. 1 and 10 show the receptacle 12 inraised spin position. It will be noted that the agitator gear 33 isdisengaged and that the base of the receptacle is fully raised from offthe plate 27. The receptacle is raised to this position by rotation ofthe lift cam 86 to a point such that the step 139 is in contact with thecone-like surface 8'7. The sequence cam, in this position of operationof the device, is in the position shown in Fig. 6 and indexing cam 89 isin the position shown in Fig. 4. It may now be assumed that the operatorwishes to change to a position such that the receptacle will be seatedand can be again filled with liquid for a washing operation. The knob 114 is rotated in a direction to turn the sequence cam counter-clockwise,as viewed in Figs. 6 and 10. Such movement of thesequence cam causes thepin 118 to ride outwardly over segment 132 and on to segment 124. Thisoutward movement of pin 118 swings channel member 117 outwardly,withdrawing the roller 119 from the ring 76. Such movement of the member117 tensions springs 121 and 122. However, since spring 122 connectsring 76 with the member 117, it acts to swing ring 76 from the positionof Fig. 4 to that of Fig. 5.

However, segment 124 has to do with positioning the parts for a washingoperation wherein the agitator clutch can be engaged and, so, the knob114 is further rotated to rotate the sequence cam 101 to the positionthat the pin 118 moves beyond the segment 124 inwardly on to segment128. This inward movement of pin 118'partial-v engage the last shoulder98 due to the position of the ring 76. Since the indexing plate isattached to the base of the lift cam, this oscillating movement willrotate the lift cam to a position such that the step 137 is beneath thecone-like surface 87 and the sequence cam will occupy the position shownin Fig. 7. In this position of the parts, the receptacle is seated onthe plate 27 and the agitator gear 33 disengaged. The receptacle may nowbe filled with liquid preparatory to a washing operation.

Upon completion of filling the receptacle, the knob 114 may be rotatedto turn the sequence cam in a clockwise direction to cause pin 118 toride outwardly on to segments 12$ (compare Figs. 7 and 8). This slightoutward swinging of member 117 sufficiently tensions spring 122 to swingring 76 to position the hook 79 thereof for engagement with shoulder 98,further rotating the indexing plate and the lift cam to bring the lowerstep 136 of the lift cam into position beneath the cone-like surface 87.The receptacle 12, already being seated onthe plate 27, will not movedownwardly with this change of position of the lift cam but, as clearlyindicated in the above mentioned application, further downward movementof the cylindrical member 88 will allow the agitator drive shaft 32 tomove downwardly, bringing gear 32 into mesh with ring gear 46. In thisposition (Fig. 8) the agitator will oscillate and continue to do sothroughout a period determined by the speed at.

which the sequence cam is caused to rotate by means of a suitable timingmechanism.

Again to illustrate the particular novelty of the present structure, itmay be assumed that the operator wishes to quickly terminate the washingoperation, making of it practically a rinsing operation. Of course, thereceptacle must first be drained and, so, the knob 114 isturned in adirection to rotate the sequence cam clockwise, as viewed in the variousfigures. Such rotation causes the pin 118 to move from segment 124inwardly of the cam on to segment 132. Thus, spring 121, previouslyplaced under tension, moves ring 76 through contact with roller 119,from the position of Fig. 5 to a position similar to Fig. 4, through theaction of spring 122. Hook 81 will now function to engage and rotate theindexing plate 89. Here again, however, the inward movement of theroller is only sufiicient to swing the arm 78 into a position for theoscillating movement thereof to effect successive engagement of hook 81with shoulders 92 and 94, moving said plate only two of the possiblethree steps. This rotation of the indexing plate rotates the lift cam 86to bring step 138 into contact with the cone-like surface 87.Examination of Fig. 9 will show that raising the member 88 to thisextent has disengaged gears 33 and 46 and raised the receptacle from offthe plate 27. Thus, the agitator has ceased operating and liquid ispermitted to drain out of the receptacle through openings 39 in the basethereof.

After the receptacle has drained to the extent desired by an operator ofthe device, the knob 114 may be turned to rotate the sequence cam andallow pin 118 to move on to segment 134. This last inward swinging ofthe member 117 urges ring 76 into the position shown in Fig. 4 andallows hook 81 to engage the last shoulder 94 of the indexing plate,rotating said plate and the attached lift cam sufficiently to bring step139 of the lift cam into contact with the surface 87. The operativeparts now are in the position shown in Fig. 10 and, although forming nopart of the present invention, this 7 last raising of the receptacleserves to actuate a clutch by which rotation of the receptacle effects aspin drying operation.

From the foregoing it will be evident that, regardless of the timedsequence of the various operations in a cycle beginning with a fillingoperation and ending in a spin drying operation, an operator maymanually cut short the time period of any of these operations or mayrevert to and repeat a previous operation, or even advance severaloperations. It will be evident that the operator control knob 114 issolely a setting or shifting device and does not constitute the actualmeans by which the receptacle is raised or lowered or the agitatorengaged or disengaged. In other words, the oscillating mechanism of thedevice provided for operation of the agitator is made to serve as asource of power for manipulating a heavy receptacle.

Although applicant has shown and described only one form of hisinvention, it will be apparent to those skilled in the art thatmodifications of the particular parts of the structure may be made intheir adaptation to devices of different capacities and that suchmodifications are contemplated as being within the spirit and scope ofthe invention insofar as they are set out in the annexed claims.

Having thus set forth my invention, what I claim as new and for which Idesire protection by Letters Patent isz.

1. Mechanism for the axial movement of a sleeve mounted receptacle in asequentially operable washing machine com rising a lift cam incontinuous contact with a cone-like surface on the base of said sleeve,a driven oscillating member, means carried by said member operable toengage and rotate said lift cam, a sequence cam, other means operable bysaid sequence cam to engage said means with said lift cam, and manuallyactuable means for operating said sequence cam in either direction.

2. Mechanism for the axial movement of a sleeve mounted receptacle in asequentially operable washing machine comprising a lift cam in contactwith a conelike surface on the base of said sleeve and supporting saidsleeve and receptacle, a driven oscillating member, means pivotallycarried by said member swingable into engagement with said cam andoperable by said memher to rotate said cam in either direction, asequence cam, and other means operable by said sequence cam to swingsaid pivotal means into engagement with said lift cam.

3. Mechanism for the axial movement of a sleeve mounted receptacle in asequentially operable washing machine comprising a lift cam in contactwith a conelike surface on the base of said sleeve and supporting saidsleeve and receptacle, a driven oscillating member, means pivotallycarried by said member swingable into selective engagement with saidlift cam and operable by said member to rotate said cam, a sequence cam,other means operable by movement of said sequence cam to swing saidmeans into selected engagement with said lift cam.

4. Mechanism for the axial movement of a sleeve mounted receptacle in asequentially operable washing machine comprising a lift cam in contactwith a conelike surface on the base of said sleeve, a drivenoscillatable member, means carried by said member movable intoengagement with and operable to rotate said lift cam in both clockwiseand counterclockwise directions, and manually controlled means operableto move said means to effect rotation of said lift cam in a selected.direction.

5. Mechanism for the axial movement of a sleeve mounted receptacle in asequentially operable washing machine comprising a lift cam in contactwith a cone-like surface on the base of said sleeve, and rotatable toaxially move said receptacle, a driven oscillatable member, swingablemeans carried by said member movable into either of two positions forengagement with said lift cam and operable to rotate said cam in eitherof said directions to raise or lower said receptacle, a sequence cam,operator actuable means for rotating said sequence cam, and other meansso connecting said sequence cam with said swingable means as to movesaid swingable means into selected engagement with said lift cam.

6. Mechanism for the axial movement of a sleeve mounted receptacle in asequentially operable washing machine comprising a shaft supported liftcam in contact with a cone-like surface on the base of said sleeve androtatable to axially move said sleeve, a driven oscillatable member,means carried by said member pivotally movable with respect thereto toselectively engage opposed projections on said cam and effect rotationthereof, and manually actuable means for pivoting said means andeffecting desired directional rotation of said cam by said member.

7. Mechanism for the axial movement of a sleeve mounted receptacle in asequentially operable washing machine comprising a lift cam, a drivenoscillating member, a rocker pivotally carried by said member, opposedarms of said rocker being selectively engageable with said lift cam andoperable by repeated oscillation of said member to rotate said lift cam,and manually controlled means for pivotting said rocker to engage aselected one of said arms with said lift cam whereby to rotate it in adesired direction.

8. Mechanism for the axial movement of a sleeve mounted receptacle in asequentially operable washing machine comprising a rotatable member, acam on said member in contact with a cone-like surface on the base ofsaid sleeve and supporting said sleeve and receptacle, a drivenoscillatable member, a rocker swingably mounted on said driven memberand including hooks selectively engageable with said rotatable member,and manually actuable means operatively connected with and adapted toswing said rocker to engage one of said hooks with said member andeffect rotation of said rotatable member in a desired direction.

9. Mechanism for the axial movement of a sleeve mounted receptacle in asequentially operable washing machine comprising a plate having a camrim engaged with a cone-like surface and serving to support said sleeveand receptacle, and being rotatable to change the height of said rimwhereby to raise and lower said receptacle, a series of teeth on thebase of said plate, a driven oscillating member, rockable means carriedby said member selectively engageable with the teeth of said plate andoperable by said member to rotate said plate, manually controlled meansoperatively associated with and adapted to adjust said rockable means toengage selected teeth and effect rotation of said plate in a desireddirection.

10. Mechanism for the axial movement of a sleeve mounted receptacle in asequentially operable washing machine comprising a lift cam in contactwith the lower end of said sleeve and serving to support said sleeve andreceptacle, a driven oscillating member, means carried by saidoscillating member operable to selectively engage and rotate said cam ineither direction whereby to raise and lower said receptacle, andmanually controlled moans operatively associated with and adapted toeffect selected engagement of said means with said cam.

References Cited in the file of this patent UNITED STATES PATENTS1,892,441 Wales et al Dec. 27, 1932 2,350,108 Geldhof et al May 30, 19442,361,767 Hays Oct. 31, 1944 2,502,965 Knapp Apr. 4, 1950

